Analysis of students’ performance. 250 students appeared for a test of 500 marks. The scores they obtained have a mean of 383, a first quartile of 355, a third quartile of 402, and a 90th percentile of 437. Interpret each of these numerical descriptive measures.
mean = 383
it means on average, students scored 383 marks
Q1 = 355
it means 25th percentile is 355 or
25% of all students performed below 355 marks
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Q3 = 402
it represents that 75% of all students have marks below 402
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90th percentile = 437
it represents that 437 is greater than 90% of the scores of people taking the test .
Analysis of students’ performance. 250 students appeared for a test of 500 marks. The scores they...